64335231973 has 2 divisors, whose sum is σ = 64335231974. Its totient is φ = 64335231972.

The previous prime is 64335231949. The next prime is 64335232007. The reversal of 64335231973 is 37913253346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59505259969 + 4829972004 = 243937^2 + 69498^2 .

It is a cyclic number.

It is not a de Polignac number, because 64335231973 - 2⁹ = 64335231461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64335231773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32167615986 + 32167615987.

It is an arithmetic number, because the mean of its divisors is an integer number (32167615987).

Almost surely, 2^64335231973 is an apocalyptic number.

It is an amenable number.

64335231973 is a deficient number, since it is larger than the sum of its proper divisors (1).

64335231973 is an equidigital number, since it uses as much as digits as its factorization.

64335231973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 46.

The spelling of 64335231973 in words is "sixty-four billion, three hundred thirty-five million, two hundred thirty-one thousand, nine hundred seventy-three".